Harken 18mm Fly Soft Attach Block Narrow 2161 KEELBOAT clothing The pump turns on every

The pump turns on every 2 1/2 minutes for about 1 secondto sense for water

The unique sheave design has 12 gripping faces which directly resist loaded line movement

to ensure water contact

Tested to withhold over 500kgs

Red plastic grip handle

Harken 18mm Fly Soft Attach Block Narrow 2161 KEELBOAT clothing The pump turns on everyHarken soft attach Fly blocks are designed to provide strength without mass, providing sailors with big power in a low aero package. Designed specifically for high tech line, these efficient blocks have an incredible working load for their small size. Fly blocks are perfect for use on foiling dinghies and sportboats and for vang cascades and backstay systems on Grand Prix racers. 18 mm blocks feature an integrated stainless steel inner race and rivet,